These Steeda Supercharger Pulleys are made from Steel not aluminum and have holes drilled around the center of the pulley to lower the rotational weight. This is the highest quality pulley available for the 2003-04 Cobra.
- 3.10" pulley 1-2psi over stock, requires Dialosport Chip.
Testing has shown 25+ horsepower.
- 2.81" pulley 4-5psi over stock, requires Diablosport Chip & shorter belt.
- Testing has shown gains of 60+ horsepower.
